In-line heater for hot water carpet cleaning extractors



FIG. 1 is a front perspective view of an in-line heater for hot water carpet cleaning extractors showing my new design;

FIG. 2 is a rear perspective view thereof; and,

FIG. 3 is a side elevational view thereof. 

The ornamental design for an in-line heater for hot water carpet cleaning extractors, as shown and described. 